Kinetics of Multi-Step Processes of Thermal Degradation of Co(II) Complex With N-Benzyloxycarbonylglycinato Ligand. Deconvolution of DTG Curves
Abstract
Thermal decomposition of Co(II) complex with N-benzyloxycarbonylglycinato ligand, [Co(N-Boc-gly)(2)(H2O)(4)]center dot 2H(2)O, in non-isothermal conditions occurs in three complex steps. In order to investigate detail kinetics of first two steps, dehydration and ligand degradation, DTG curves were deconvoluted using product of Gaussian and Lorentzian function. It was shown that process of complex dehydration consists of three, while process of ligand fragmentation consist of five elementary steps. For elementary steps the kinetic triplet (E-a, Z and f(alpha)) was determinated. Kinetic parameters were obtained by application of IKP method. On the basis of Malek's criteria and Sestak-Berggren's method, Sestak-Berggren's model, f(alpha)=alpha(M)(1-alpha)(N) was suggested for all elementary steps, while Master plot method and Perez-Maqueda criteria confirmed suggested reaction models. The thermodynamic activation parameters were calculated for process of complex dehydration, and lifetime f...or first elementary step of the dehydration and ligand degradation processes was estimated.
Keywords:
Kinetics / Co-N-benzyloxycarbonylglycinato complex / Thermal degradation / DTG curves deconvolutionSource:
Science of Sintering, 2014, 46, 1, 37-53Publisher:
- Int Inst Science Sintering (I I S S), Belgrade
Funding / projects:
DOI: 10.2298/SOS1401037S
ISSN: 0350-820X
WoS: 000339449400004
Scopus: 2-s2.0-84899688344
Collections
Institution/Community
Hemijski fakultet / Faculty of ChemistryTY - JOUR AU - Šumar-Ristović, Maja AU - Minić, Dragica M. AU - Blagojević, Vladimir A. AU - Anđelković, Katarina K. PY - 2014 UR - https://cherry.chem.bg.ac.rs/handle/123456789/1818 AB - Thermal decomposition of Co(II) complex with N-benzyloxycarbonylglycinato ligand, [Co(N-Boc-gly)(2)(H2O)(4)]center dot 2H(2)O, in non-isothermal conditions occurs in three complex steps. In order to investigate detail kinetics of first two steps, dehydration and ligand degradation, DTG curves were deconvoluted using product of Gaussian and Lorentzian function. It was shown that process of complex dehydration consists of three, while process of ligand fragmentation consist of five elementary steps. For elementary steps the kinetic triplet (E-a, Z and f(alpha)) was determinated. Kinetic parameters were obtained by application of IKP method. On the basis of Malek's criteria and Sestak-Berggren's method, Sestak-Berggren's model, f(alpha)=alpha(M)(1-alpha)(N) was suggested for all elementary steps, while Master plot method and Perez-Maqueda criteria confirmed suggested reaction models. The thermodynamic activation parameters were calculated for process of complex dehydration, and lifetime for first elementary step of the dehydration and ligand degradation processes was estimated. PB - Int Inst Science Sintering (I I S S), Belgrade T2 - Science of Sintering T1 - Kinetics of Multi-Step Processes of Thermal Degradation of Co(II) Complex With N-Benzyloxycarbonylglycinato Ligand. Deconvolution of DTG Curves VL - 46 IS - 1 SP - 37 EP - 53 DO - 10.2298/SOS1401037S ER -
@article{ author = "Šumar-Ristović, Maja and Minić, Dragica M. and Blagojević, Vladimir A. and Anđelković, Katarina K.", year = "2014", abstract = "Thermal decomposition of Co(II) complex with N-benzyloxycarbonylglycinato ligand, [Co(N-Boc-gly)(2)(H2O)(4)]center dot 2H(2)O, in non-isothermal conditions occurs in three complex steps. In order to investigate detail kinetics of first two steps, dehydration and ligand degradation, DTG curves were deconvoluted using product of Gaussian and Lorentzian function. It was shown that process of complex dehydration consists of three, while process of ligand fragmentation consist of five elementary steps. For elementary steps the kinetic triplet (E-a, Z and f(alpha)) was determinated. Kinetic parameters were obtained by application of IKP method. On the basis of Malek's criteria and Sestak-Berggren's method, Sestak-Berggren's model, f(alpha)=alpha(M)(1-alpha)(N) was suggested for all elementary steps, while Master plot method and Perez-Maqueda criteria confirmed suggested reaction models. The thermodynamic activation parameters were calculated for process of complex dehydration, and lifetime for first elementary step of the dehydration and ligand degradation processes was estimated.", publisher = "Int Inst Science Sintering (I I S S), Belgrade", journal = "Science of Sintering", title = "Kinetics of Multi-Step Processes of Thermal Degradation of Co(II) Complex With N-Benzyloxycarbonylglycinato Ligand. Deconvolution of DTG Curves", volume = "46", number = "1", pages = "37-53", doi = "10.2298/SOS1401037S" }
Šumar-Ristović, M., Minić, D. M., Blagojević, V. A.,& Anđelković, K. K.. (2014). Kinetics of Multi-Step Processes of Thermal Degradation of Co(II) Complex With N-Benzyloxycarbonylglycinato Ligand. Deconvolution of DTG Curves. in Science of Sintering Int Inst Science Sintering (I I S S), Belgrade., 46(1), 37-53. https://doi.org/10.2298/SOS1401037S
Šumar-Ristović M, Minić DM, Blagojević VA, Anđelković KK. Kinetics of Multi-Step Processes of Thermal Degradation of Co(II) Complex With N-Benzyloxycarbonylglycinato Ligand. Deconvolution of DTG Curves. in Science of Sintering. 2014;46(1):37-53. doi:10.2298/SOS1401037S .
Šumar-Ristović, Maja, Minić, Dragica M., Blagojević, Vladimir A., Anđelković, Katarina K., "Kinetics of Multi-Step Processes of Thermal Degradation of Co(II) Complex With N-Benzyloxycarbonylglycinato Ligand. Deconvolution of DTG Curves" in Science of Sintering, 46, no. 1 (2014):37-53, https://doi.org/10.2298/SOS1401037S . .